Description: Heat Heater A/C AC Fan Air Vent Blend Door Actuator for Chevy GMC Pickup Truck Detailed Applications Specifications: Brand New Door Actuator (as listed per application) Temperature Blend Door - Controls the temperature of air in the interior of the vehicle Vent Mode - Responsible for directing air to different vents Air Inlet - Allows for fresh air to enter vehicle cabin Direct fit replacement Controls the airflow and/or regulates the temperature of the airflow into the vehicle Direct replacement Built to strict quality control standards 100% tested prior to leaving the factory 52402588, 52402598, 52402612, 89018365 .